<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
    <style>
      .grid {
        display: grid;
        grid: [A-start] 100px [A-end B-start] 100px [B-end C-start] 100px [C-end] / [A-start] 100px [A-end B-start] 100px [B-end C-start] 100px [C-end] 
      }
      .item {
        grid-column-start: A;
        grid-column-end: B;
        grid-row-start: 2;
        grid-row-end: 4;
        /* grid-column grid-row */
        /* grid-area r-s / c-s / r-e /c-e*/

        background-color: #f0f;
      }
    </style>
  </head>
  <body>
    <div class="grid">
      <div class="item"></div>
    </div>
  </body>
</html>

